Alarm clock



FIG. 1 is a front top perspective view of the alarm clock showing my new design;

FIG. 2 is an inverted rear bottom perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof.

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left side elevational view thereof; and,

FIG. 8 is a right side elevational view thereof.

The broken lines showing portions of the alarm clock illustrate environmental structure only and form no part of the claimed design. 

CLAIM The ornamental design for an alarm clock, as shown and described. 